Apparatus for winding strand material

ABSTRACT

A winding apparatus for forming a cylindrical package of a strand material comprises a stationary traverse assembly having a guide which reciprocates back and forth to guide the strand material onto the package, a mandrel that is movable relative to the traverse assembly for receiving a tube on which the package is wound, a drive train for driving both the traverse assembly and the mandrel by means of a single drive belt regardless of the relative positions of the traverse assembly and the mandrel, and a sensing device for sensing the diameter of the package and effecting movement of the mandrel in small increments away from the traverse assembly as the package builds.

United States Patent 1 Genson [5 APPARATUS FOR WINDING STRAND MATERIAL[75] Inventor: Samuel Richard Genson, Weston,

Ohio

[73] Assignee: Johns-Manville Corporation,

Greenwood Village, C010.

[22] Filed: Sept. 28, 1972 [21] Appl. No; 293,179

[52] US. Cl. 242/18 R, 242/18 G, 242/43 [51] Int. Cl B6511 54/02 [58]Field 01 Search 242/18 R, 18 G, 18 DD, 242/43, 43 A [56] ReferencesCited UNITED STATES PATENTS 2,463,773 3/1949 Jencks 242/18 R 2,670,1462/1954 Heizer 242/18 R 2,972,450 2/1961 Brierley 242/18 R 3,195,8217/1965 Woosey et a1. 242/18 G 3,510,078 5/1970 Tsukuma et a1. 242/18 R3,547,361 12/1970 Klink 242/18 G 3,617,009 11/1971 Lawson 242/18 R [11]3,819,122 [4 June 25, 1974 FOREIGN PATENTS OR APPLICATIONS 1,168,89310/1969 Great Britain 242/43 A 1,192,810 5/1970 Great Britain 242/43 APrimary Examiner-Stanley N. Gilreath Attorney, Agent, or Firm-Robert M.Krone; John D. Lister [5 7] ABSTRACT A winding apparatus for forming acylindrical package of a strand material comprises a stationary traverseassembly having a guide which reciprocates back and forth to guide thestrand material onto the package, a mandrel that is movable relative tothe traverse assembly for receiving a tube on which the package iswound, a drive train for driving both the traverse assembly and themandrel by means of a single drive belt regardless of therelativepositions of the traverse assembly and the mandrel, and asensing device for sensing the diameter of the package and effectingmovement of the mandrel in small increments away from the traverseassembly as the package builds.

7 Claims, 6 Drawing; Figures PATENTEDJU'NZS I274 "sumaom BACKGROUND OFTHE INVENTION The present invention relates to an apparatus for windinga strand material and in particular to such an apparatus which isprovided with a unique drive train and assembly for repositioning themandrel relative to the traverse assembly.

The standard forming winders now being used, build a package which istapered on each end to help prevent layers of yarn from sluffing off theends. However, even with the use of tapered ends, the package sizeformed on these standard winders is limited when a diameter is reachedwherein the succeeding layers of yarn start sluffing off the ends andmake the package unfit for use. In addition, the inherent inaccuratesresulting from winding the yarn on these tapered packages causes yardagevariations in the packages.

Many of these machines have traverse assemblies which recede from themandrel as the package builds. As a result of the movement of thetraverse assembly, the angle of introduction and departure of the strandrelative to the strand guide changes thereby causing a change in thewinding tension. As the strand is forced farther around the strandguide, the tension increases within the strand thereby causing thelayers on the package to become more tightly wound as the package buildsand increasing the probability of strand breakage. In addition,successive layers tend to overlap and become virtually tied together.Consequently the strands cannot be freely unwound from the package whenthe package is used in a subsequent process.

SUMMARY OF THE INVENTION It is an object of the present invention toprovide a winding apparatus which moves the mandrel away from thetraverse assembly in such a manner as to maintain a constant tension onthe strand and a unique drive assembly for the winding apparatus whichis uncomplicated and permits the required movement of the mandrelrelative to the traverse assembly. It is a further object to combinethis type of assembly with a strand guide which is accuratelyreciprocated back and forth to develop a package which is cylindrical inshape with end walls that lie in planes substantially perpendicular tothe axis of the package.

Accordingly, the present invention provides an apparatus for forming acylindrical package of a strand material. The apparatus includes atraverse assembly, a mandrel assembly, a carriage assembly, a sensorassembly and a drive train. The traverse assembly is mounted on a frameof the apparatus in a fixed position and has a strand guide that isaccurately reciprocated back and forth by a traverse drive to guide thestrand onto the package. The mandrel assembly receives a tube on whichthe package is wound and is rotatably mounted on the carriage assemblywhich is movable relative to the traverse assembly. The sensor assemblysenses a package diameter and effects movement of the carriage assemblyin accordance with the sensed diameter to maintain the surface of thepackage in a substantially constant position relative to the strandguide. The drive train drives both the traverse drive and the mandrel.The drive train includes a drive belt trained about idler pulleys, apulley of the traverse drive and a pulley of the mandrel in such amanner as to maintain a constant distance for the belt travel regardlessof the distance be tween the pulleys of the traverse drive and themandrel.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective viewillustrating the general layout of the strand winding apparatus and itsposition relative to a bushing for producing strand material;

FIG. 2 is an end view of the apparatus substantially along lines 2-2 ofFIG. 1 with portions removed to better illustrate the carriage, thedrive train and the mandrel of the winding apparatus;

FIG. 3 is a side view of the drive train of the apparatus takensubstantially along lines 3-3 of FIG. 1;

FIG. 4 is a plan view taken substantially along lines 44 of FIG. 1 withportions broken away to better illustrate the carriage, the drive trainand the traverse assembly of the winding apparatus;

FIG. 5 is an end view of the traverse assembly and the mandrel toillustrate the relationship between a package on the mandrel and thetraverse assembly; and

FIG. 6 is a view taken at the inner end of the traverse assembly toillustrate portions of the sensor assembly for initiating movement ofthe carriage.

DESCRIPTION OF THE PREFERRED EMBODIMENT FIG. 1 illustrates a strandwinding apparatus 20, a bottom portion of a bushing 22, a sizingapplicator 24 and a gathering wheel 26. A number of glass filaments 28are drawn from the bushing 22 and gathered into a strand 30 by means ofthe gathering wheel 26. The applicator 24 applies an appropriate sizingto the filaments before they are gathered into the strand 30. The strand30 passes from the gathering wheel 26 to the strand winding apparatus 20where it is wound into a package 32.

The strand winding apparatus 20 is provided with a traverse assembly 34that guides the strand onto the package 32 which is carried on a mandrelassembly 36. The traverse assembly 34 includes a strand guide 38, adrive pulley 40, a traversing cam 42, a strand guide bar 44 and a strandstarting guide 46.

The drive pulley 40and the traversing cam 42 are affixed to a commonshaft 48. The shaft 48 is rotatably supported by bearings (not shown)that are mounted in the traverse housing 50. These bearings support theshaft 48 intermediate the drive pulley 40 and the traverse cam 42 and atits outer end. With this construction when the drive pulley 40 isrotated the cam 42 is caused to rotate about the axis of shaft 48.

The cam 42 is provided with a pair of continuous spiral grooves 52 and54 with transition grooves 56 at each end of the cam connecting thespiral grooves 52 and 54 together. The spiral groove 52 is a left handhelix and the spiral groove 54 is a right hand helix. These helices havethe same pitch and consequently guide the strand guide 38 back and forthacross the face of the package 32 at the same rate. The strand guide 38is slidably mounted on a support bar 58 and is provided with a camfollower 60 which is received within and guided by the grooves 52 and 54to accurately reciprocate the guide 38 back and forth across the face ofthe package 32.

The strand guide bar 44 is secured at its outer end to the traversehousing 50 and extends parallel to the axis of the mandrel assembly 36.The strand guide bar 44 is located above the strand guide 38 between thestrand guide 38 and the gathering wheel 26 to guide the strand 30 fromthe gathering wheel 26 to the strand guide 38.

The strand starting guide 46 is mounted on the outer end of the traversehousing 50 above the guide bar 44. The strand starting guide 46 is apiston type double acting air cylinder which is connected by pneumaticlines to a valve (not shown). By manipulating the valve the air cylindercan be actuated to extend or retract a piston rod which has an enlargedportion or guide 62 at its outer end. An outer surface of the guide 62is aligned with a cylindrical starting surface 64 on the mandrelassembly 36. With this construction when the piston rod of the startingguide 46 is extended, the guide 62 diverts the strand 30 from its normalposition which would be centered with respect to the traverse assembly34 to the outer end of the traverse assembly where it is aligned withthe starting surface 64 of the mandrel assembly 36. Upon retraction ofthe piston rod and consequently the guide head 62, the strand 30 movesback toward the center of the traverse assembly where it isautomatically picked up by the strand guide 38 for the winding of thepackage 32.

The mandrel assembly 36 comprises the mandrel 66 which carries thepackage 32 and a shaft 68 on which the mandrel 66 is rotatably mounted.The mandrel assembly 36 is a motor with the mandrel 66 forming the rotorof the motor and the shaft 68 forming the stator of the motor. Thismotor is the sole driving means for both the mandrel assembly 36 and thetraverse assembly 34. One end of the shaft or stator 68 is mounted in aclamping block 70 on a carriage assembly 72. The clamping block 70supports the shaft and the mandrel is in turn, supported on the shaft orstator 68 by a bearing 74 near the clamping block 70 and a similarbearing not shown at the outer end of the shaft 68. The shaft or stator68 is hollow and an electrical cable 76 for the motor pass from anelectrical box 78 throughthe hollow shaft 68 to the windings of themotor.

The mandrel 66 includes a main portion which receives paper tubes forthe packages 32 and an extension having a pulley 80 thereon. The pulley80 is aligned with the drive pulley 40 of the traverse assembly. In thisway, the mandrel motor not only effects the rotation of the mandrel 66but also provides a drive for the traverse assembly 34.

The carriage 72 which supports the mandrel assembly 36 is slidablymounted on a pair of horizontally extending support rods 82 and 84 whichare bolted or otherwise secured at their ends to the cabinet or frame ofthe assembly. The support rods 82 and 84 are parallel with respect toeach other and extend perpendicular to the longitudinal axes of both thetraverse assembly 34 and the mandrel assembly 36. The support rods 82and 84 serve to both support and guide the carriage 72 in a directionwhich is perpendicular to the axes of the mandrel assembly 36 and thetraverse assembly 34 so that the mandrel 66 with the package 32 thereoncan be withdrawn from the traverse assembly 34 while being maintained inthe correct orientation with respect to the traverse assembly 34 toassure the proper formation of the package 32.

The carriage 72 is also provided with a hydraulic double acting pistontype cylinder assembly 86 for effecting the movement of the carriagealong the support rods 82 and 84 both toward and away from the traverseassembly 34. One end of the cylinder of the piston assembly 86 issecured by a bolt 88 to the cabinet while the other end of the housingis received within a recess 89 of the carriage 72. The outer end of thepiston rod 90 of the cylinder is secured to the carriage 72 by a bolt91. A four-way solenoid valve assembly (not shown) is provided toexhaust hydraulic fluid from one side of the piston to a resevoir whileadmitting pressurized hydraulic fluid to the other side of the pistonfrom a pressure line to effect the movement of the piston andconsequently the carriage 72. The valve is a three-position valve and isspring centered so that it normally is in its neutral position whereinboth ports to the hydraulic cylinder 86 are closed. Upon actuation thevalve is shifted from its neutral position to admit and exhausthydraulic fluid from the cylinder 86 and thereby effect movement of thecarriage.

In addition to the traverse drive pulley 40 and the mandrel pulley 78,the drive train of the winding apparatus includes an idler pulley 92secured to the carriage 72 and an adjustable idler pulley 94 mounted onthe frame of the assembly. The idler pulley 92 is rotatably mounted on ashaft 96 which is secured by means of a clamping block 98 to thecarriage 72. The axis of rotation of the idler pulley 92 is parallel tothe axes of rotation of the pulleys 40 and 80 and the pulley lies in thesame vertical plane as pulleys 40 and 80.

The axis of rotation of the idler pulley 94 is also parallel to the axesof rotation of pulleys 40 and 80 and the pulley 94 lies in the samevertical plane as pulleys 40 and 80. The adjustable idler pulley 94 isrotatably mounted on a shaft 100 which is secured to a slide 102 by apair of bolts 104. The slide is provided with a pair of depending blocks106 which extend parallel to the axis of shaft 100 and are slidablymounted on a pair of rods 108 extending through the blocks andperpendicular to shaft 100 in a generally horizontal plane. The rods 108which provide both support and guidance for the slide 102, are mountedin a pair of support blocks 110 and 112 that are affixed to the frame ofthe strand winding assembly. A shaft 114 is provided to effect movementof the slide 102 and consequently the idler pulley 94. One end of theshaft 114 is rotatably supported in a collar which is mounted in block110. The collar 120 permits the shaft to rotate but prevents axialmovement to the shaft 114 relative to the block 110. The other end ofthe shaft 114 is threaded and is received in threaded apertures withinblocks 106. Consequently, by turning the shaft 114, the idler pulley 94can be adjusted in a plane which includes the other pulleys of the driveassembly. In this manner the idler pulley 94 can be adjusted to providethe proper tension in a double sided toothed timing belt 1 16 which istrained about the pulleys. Once the pulley 94 has been promptlyadjusted, a set screw 122 can be tightened to prevent further movementof the shaft 114.

The traverse drive pulley 40 and the idler pulley 94 are both mounted onthe cabinet or frame of the assembly and remain stationary during thewinding operation of the apparatus. The mandrel pulley 80 and the idlerpulley 92 are both mounted on the carriage 72 and move with the carriage72 as the mandrel 66 recedes from the traverse assembly 34 during thewinding operation. The mandrel pulley 80 lies intermediate the traversedrive pulley 40 and the idler pulley 94. The line of travel of the beltfrom the traverse drive pulley 40 to the idler pulley 92 is parallel tothe line of travel of the belt between the mandrel pulley 80 and theidler pulley 94. As pulleys 80 and 92 move in a direction parallel tothe line of belt travel between the pulley 40 and the idler pulley 92plus pulley 80 and idler pulley 94, the change in distance of the belttravel between the pulley 40 and the idler pulley 92 is equal butopposite to the change in distance of the belt travel between the pulley80 and the idler pulley 94. The result is that there is no net change inthe distance of travel for the belt 116. Consequently, with thisarrangement, the mandrel 66 which includes the pulley 80 can be movedtoward or away from the traverse assembly 34 which is coaxial with thepulley 40 without the need for separate drives or drive trains for thetraverse assembly 34 and the mandrel assembly 36. While the lines oftravel for the belt intermediate the pulleys 40 and 92, plus pulleys 80and 94 are horizontal, the movement of the carriage 72 is horizontal,and the pulley 80 is located in a vertical plane intermediate thepulleys 94 and 40 the drive assembly need not be restricted to thisspecific arrangement. As long as the direction of travel for the beltbetween the pulley 40 and the pulley 92 and between the pulley 80 andthe pulley 94 are parallel, the movement of the carriage is parallel tothis line of travel of the belt and the mandrel pulley 80 remainsbetween the pulley 40 and the pulley 94. The drive assembly willfunction as desired.

A sensing unit 124 of the winding apparatus detects the diameter of thepackage 32 and actuates the four way valve for the hydraulic cylinder 86to move the carriage 72 and consequently the mandrel 66 in accordancewith the package diameter so that the mandrel 66 is properly positionedrelative to the traverse assembly 34. The sensing unit 124 includes aroller bail 126 which extends the entire length of the package 32 and issupported by a pair of arms 128 which are affixed to a shaft 130. Theroller bail 126 is a thin walled alumi num tube with a gas bearingmounted in each end that is in turn secured to one of the arms 128. Thegas is supplied to the bearing from a source of pressurized air throughbores in the shaft arms 128 and shaft 130. Since the roller bail 124turns on gas (compressed air) bearings, there is no friction and verylittle inertia. Thus the roller bail 124 exerts little or no drag on thestrand 30. The shaft 130 is rotatably mounted in the traverse assemblyhousing 50 and extends through the cabinet of the winding apparatus.

As shown in FIG. 6 the shaft 130 has a collar 132 affixed thereto whichis provided with a radially extending arm 134. A spring 136 extendsbetween and is secured to both the arm 134 and a bolt 138 in the frameof the apparatus. The spring 136 which is in tension exerts a clockwisetorque (as viewed in FIG. 6) on the shaft 130 which in turn exerts aclockwise torque on the roller bail 126 to urge it into contact with thesurface of the package 32. The force exerted is approximately 3 poundswhich is distributed by the roller bail 126 across the entire surface ofthe package 32. This force is sufficient to keep the bail in contactwith the package but the force is not high enough to damage the strand30 as the strand is wound onto the package 32.

The collar 132 also includes a boss 140 which has a rod 142 mountedtherein. The rod 142 extends upward from the boss 140 and has an upperend which is located adjacent a switch 144 which activates the valve forthe hydraulic cylinder 86. The actuating arm 146 of the switch 144 andthe rod 142 are normally separated when the surface of the package 32 isin the correct position relative to the strand guide 38. However, as thepackage 32 builds in diameter the roller bail 126 is forced away fromthe mandrel 66 and rotates the shaft in a counter clockwise directionthereby bringing the rod 142 into contact with the actuating arm 146 ofthe switch 144. In the preferred embodiment the switch is a touchswitchwherein contact between the rod 142, which is a grounding rod, and theactuating arm 146 of the switch completes the circut to actuate thevalve for the hydraulic cylinder. When the rod 142 actuates the switch144, the four-way valve for the hydraulic cylinder 86 is actuated tomove the mandrel 66 away from the traverse assembly 34 to therebyreposition the surface of the package 32 in the correct locationrelative to the strand guide 38. This allows the roller bail 126 torotate in a clockwise direction under the influence of the spring 136 tobring rod 142 back to its original position and deactuate the valve forthe hydraulic cylinder.

Occasionally vibrations are set up in the mandrel 66 which could jolt orotherwise jar the roller bail 126 to cause a premature actuation of thehydraulic cylinder 86. To prevent this, a piston of a hydraulic'shockabsorber or dash pot 148 is connected to another arm 150 extending outfrom the collar 132 to dampen or eliminate any sudden movements of theroller bail 126. The hydraulic shock absorber 148 comprises a hydrauliccylinder 150 with inlet-outlet ports 152 and 154 on either side of thepiston. The inlet-outlet ports 152 and 154 are connected by means of afluid conduit 156 having a valve 158 therein to regulate the flow offluid from one side of the piston to the other to thereby impede themovement of the piston and consequently, the rotation of the shaft 130to prevent any sudden movement.

In operation, the strand 30 is first passed on the outside of thestarting guide head 62, over the guide bar 44 and onto the surface 64 ofthe mandrel. As mentioned before, the starting surface 64 is beyond thepaper tube on which the package is wound. As the mandrel 66and thetraverse assembly 34 are accelerating to their operating speeds thestrand is wound on the starting surface 64 of the mandrel. When themandrel 66 and the traverse assembly 34 have reached their operatingspeeds, a timed relay switch actuates the strand guide cylinder 46 toretract the starting guide. Once the strand guide 62 is no longercontacting the strand 30, the strand shifts toward the center of thetraverse assembly 34 where it is picked up by the reciprocating strandguide 38. The strand guide 38 guides the strand back and forth acrossthe paper tube and commences to build the package 32 on the paper tube.As the package builds, the roller bail 126 is pushed farther and farther away from the axis of the mandrel thereby causing the shaft 130 torotate in a counterclockwise direction to bring the rod 142 into contactwith the switch 144 that actuates the valve for the hydraulic cylinder86. When contact is made with the switch 144 by the rod 142, the mandrel66 is moved a small increment away from the traverse assembly 34 toagain bring the surface of the package 32 into the proper positionrelative to the strand guide 38. With the movement of the package 32away from the traverse assembly 34, the spring 136 again exerts aclockwise force about the shaft 130 to maintain the roller bail 126 incontact with the surface of the package 32 and dissengage rod 142 fromthe switch. This sequence of operation is repeated until a package ofthe desired diameter is formed.

With the unique drive assembly of the present invention the mandrelmotor not only turns the mandrel 66 but also pulley 80 which in turndrives the belt 1 16. The belt 116 which is also trained over the pulley40 as well as the idler pulleys 92 and 94 drives the traverse assembly34 at a'rate which is directly proportional to the speed of the mandrel66. In addition, due to the unique placement of the idlers 92 and 94 andthe relative position of the pulleys 80 and 40 relative to these idlersand each other, the mandrel 66 can be moved relative to the trasverseassembly 34 without having to utilize separate drive trains for themandrel 66 and the traverse assembly 34. The mandrel motor is providedwith a conventional programmer which programs the motor to slow down asthe diameter of the package 32 increases. This is done to provide aconstant draw rate by maintaining a constant speed for the surface ofthe package 32.

The constant draw rate by the mandrel 66 together with the constantangle of introduction and departure of the strand 30 from the strandguide 38 and the constant angle of introduction of the strand 30 to thepackage 32 effected by movement of the mandrel 66 rather than thetraverse assembly 34 permits a constant tension to be maintained on thestrand 30. Since the traverse assembly 34 is driven by the mandrel 66and since the speeds of these two elements are directly proportional,the traverse assembly 34 is slowed down as the mandrel 66 is slowed downwhich also contributes to the precision winding of the package 32. Thestrand is accurately guided onto the package 32 by the cam 42 and strandguides 38.

The roller bail is held in contact with the package 32, to assure properactuation of the hydraulic cylinder 86 to move the mandrel, withoutexerting any drag on the strand 30. Consequently, the apparatus of thepresent invention forms an excellent package well suited for use insubsequent processes.

What is claimed is:

l. Winding apparatus for forming a package of a strand materialcomprising:

a. a frame,

b. a traverse assembly, said traverse assembly being mounted on saidframe in a fixed position, said traverse assembly having a strand guidemeans for guiding a strand onto the package, and said traverse assemblyhaving a traverse drive means for driving the guide means to reciprocatea strand in a direction generally parallel to a longitudinal axis of thepackage,

c. a mandrel for receiving a tube on which the package is wound, themandrel being rotatably mounted on a carriage which is movable relativeto said traverse assembly, means for moving said carriage to move themandrel in a straight line away from said traverse assembly, the mandrelhaving a longitudinal axis generally parallel to the direction ofreciprocation of the strand guide means, and

d. a motor for driving the traverse drive means and for rotating themandrel, the motor having a rotor means integral with the mandrel andthe the motor having a stator affixed to the carriage means forsupporting the mandrel.

2. The winding apparatus of claim 1 wherein:

a. the mandrel includes pulley means,

b. the traverse drive means includes pulley means,

and

c. drive belt means drives the traverse drive pulley means off themandrel pulley means, said drive belt means being trained over idlerpulley means for permitting movement of said mandrel pulley meansrelative to said traverse drive pulley means without changing the netdistance for belt travel about the drive train.

3. The winding apparatus of claim 2 wherein:

a. the idler pulley means comprises a first idler pulley fixed relativeto the mandrel pulley means and a second idler pulley fixed relative tothe traverse drive pulley means, the first idler pulley being mounted onthe carriage means relative to the traverse drive pulley means and thesecond idler pulley being mounted on the frame relative to the mandrelpulley means in such a manner that the change in distance between thefirst idler pulley and the traverse drive pulley means when saidcarriage means is moved is equal but opposite to the change in distancebetween the second idler pulley and the mandrel pulley means whereby thedistance of belt travel about the drive train is unchanged.

4. The winding apparatus of claim 3 wherein:

a. a line of travel of said belt between said first idler pulley andsaid traverse drive pulley means is parallel to a line of travel of thebelt between said second idler pulley and the mandrel pulley means.

5. The winding apparatus of claim 1 including:

a. sensing means for sensing the diameter of the package, and

b. wherein said moving means for moving said mandrel comprises means formoving the carriage means in accordance with the sensed diameter of thepackage to move the mandrel relative to the traverse assembly to therebykeep a constant angle of introduction and departure between the strandand the strand guide and a constant angle of introduction between strandand the package.

6. The winding apparatus of claim 5 including:

a. means for urging the sensing means into contact with the package andfor keeping the sensing means in contact with the package, said meansincluding a dash pot means to dampen any sudden movement of the sensingmeans.

7. The winding apparatus of claim 5 wherein:

a. the sensing means includes a roller bail which is substantially equalin length to the length of the package and located to contact the entirelength of the package and a means for urging the roller bail intocontact with the package.

1. Winding apparatus for forming a package of a strand material comprising: a. a frame, b. a traverse assembly, said traverse assembly being mounted on said frame in a fixed position, said traverse assembly having a strand guide means for guiding a strand onto the package, and said traverse assembly having a traverse drive means for driving the guide means to reciprocate a strand in a direction generally parallel to a longitudinal axis of the package, c. a mandrel for receiving a tube on which the package is wound, the mandrel being rotatably mounted on a carriage which is movable relative to said traverse assembly, means for moving said carriage to move the mandrel in a straight line away from said traverse assembly, the mandrel having a longitudinal axis generally parallel to the direction of reciprocation of the strand guide means, and d. a motor for driving the traverse drive means and for rotating the mandrel, the motor having a rotor means integral with the mandrel and the the motor having a stator affixed to the carriage means for supporting the mandrel.
 2. The winding apparatus of claim 1 wherein: a. the mandrel includes pulley means, b. the traverse drive means includes pulley means, and c. drive belt means drives the traverse drive pulley means off the mandrel pulley means, said drive belt means being trained over idler pulley means for permitting movement of said mandrel pulley means relative to said traverse drive pulley means without changing the net distance for belt travel about the drive train.
 3. The winding apparatus of claim 2 wherein: a. the idler pulley means comprises a first idler pulley fixed relative to the mandrel pulley means and a second idler pulley fixed relative to the traverse drive pulley means, the first idler pulley being mounted on the carriage means relative to the traverse drive pulley means and the second idler pulley being mounted on the frame relative to the mandrel pulley means in such a manner that the change in distance between the first idler pulley and the traverse drive pulley means when said carriage means is moved is equal but opposite to the change in distance between the second idler pulley and the mandrel pulley means whereby the distance of belt travel about the drive train is unchanged.
 4. The winding apparatus of claim 3 wherein: a. a line of travel of said belt between said first idler pulley and said traverse drive pulley means is parallel to a line of travel of the belt between said second idler pulley and the mandrel pulley means.
 5. The winding apparatus of claim 1 including: a. sensing means for sensing the diameter of the package, and b. wherein said moving means for moving said mandrel comprises means for moving the carriage means in accordance with the sensed diameter of the package to move the mandrel relative to the traverse assembly to thereby keep a constant angle of introduction and departure between the strand and the strand guide and a constant angle of introduction between strand and the package.
 6. The winding apparatus of claim 5 including: a. means for urging the sensing means into contact with the package and for keeping the sensing means in contact with the package, said means including a dash pot means to dampen any sudden movement of the sensing means.
 7. The winding apparatus of claim 5 wherein: a. the sensing means includes a roller bail which is substantially equal in length to the length of the package and located to contact the entire length of the package and a means for urging the roller bail into contact with the package. 